This second AA123 on 8/29 is showing the old J class. This means that AA is planning on using an un-retrofitted 763 BUT aircraft get swapped regularly (even in DFW). I will however check again for you closer to the departure date as I'll have a more realistic idea the closer it is the flight time.

Quoting Tonytifao (Reply 5):Is it safe to say that if coach class has 189 seats it has the new Business class?

No. If coach has a capacity of 195 then it has the new seats. I just checked the flight and the aircraft is not yet assigned, so it's hard to know for certain whether 123 on 29Aug will have the new seats or not. Of course, even when the a/c is assigned, it's always subject to change.